:root {
  --qr-ink: #172033;
  --qr-muted: #596579;
  --qr-line: #d8e0eb;
  --qr-panel: #ffffff;
  --qr-panel-subtle: #f6f8fb;
  --qr-accent: #2563eb;
  --qr-accent-dark: #1d4ed8;
  --qr-focus: #60a5fa;
}

.qr-diagram-card {
  margin: 1.5rem 0 2.25rem;
  overflow: hidden;
  border: 1px solid var(--qr-line);
  border-radius: 12px;
  background: var(--qr-panel);
  box-shadow: 0 12px 32px rgb(23 32 51 / 8%);
}

.qr-diagram-card__toolbar,
.qr-diagram-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.qr-diagram-card__toolbar {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--qr-line);
  background: linear-gradient(180deg, #fff 0%, #f8fafc 100%);
}

.qr-diagram-card__label-group {
  display: grid;
  min-width: 0;
  gap: 0.1rem;
}

.qr-diagram-card__eyebrow,
.qr-diagram-dialog__eyebrow {
  color: var(--qr-accent-dark);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  line-height: 1.2;
  text-transform: uppercase;
}

.qr-diagram-card__title {
  overflow: hidden;
  color: var(--qr-ink);
  font-size: 0.92rem;
  font-weight: 680;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.qr-diagram-open,
.qr-diagram-control {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 2.35rem;
  border: 1px solid #c8d2e1;
  border-radius: 7px;
  background: #fff;
  color: var(--qr-ink);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 650;
  line-height: 1;
  cursor: pointer;
  transition: border-color 120ms ease, box-shadow 120ms ease, color 120ms ease, background 120ms ease;
}

.qr-diagram-open {
  flex: 0 0 auto;
  padding: 0.5rem 0.75rem;
  border-color: var(--qr-accent);
  background: var(--qr-accent);
  color: #fff;
}

.qr-diagram-open:hover {
  border-color: var(--qr-accent-dark);
  background: var(--qr-accent-dark);
}

.qr-diagram-open svg,
.qr-diagram-control svg {
  fill: none;
  stroke: currentcolor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.qr-diagram-card > .mermaid {
  box-sizing: border-box;
  max-width: 100%;
  margin: 0;
  padding: 1.5rem;
  overflow-x: auto;
  background-color: #fbfcfe;
  background-image:
    linear-gradient(rgb(216 224 235 / 35%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(216 224 235 / 35%) 1px, transparent 1px);
  background-size: 24px 24px;
  cursor: zoom-in;
  scrollbar-color: #b8c4d4 transparent;
}

.qr-diagram-card > .mermaid > svg {
  display: block;
  min-width: 100%;
  margin: 0 auto;
}

.qr-diagram-card--wide > .mermaid > svg {
  min-width: 64rem;
}

.qr-diagram-card > .mermaid:focus-visible,
.qr-diagram-open:focus-visible,
.qr-diagram-control:focus-visible,
.qr-diagram-stage:focus-visible {
  outline: 3px solid var(--qr-focus);
  outline-offset: -3px;
}

.qr-diagram-card__footer {
  padding: 0.65rem 1rem;
  border-top: 1px solid var(--qr-line);
  color: var(--qr-muted);
  font-size: 0.72rem;
  line-height: 1.4;
}

.qr-diagram-card__hint::before {
  content: "";
  display: inline-block;
  width: 0.42rem;
  height: 0.42rem;
  margin-right: 0.42rem;
  border-radius: 50%;
  background: var(--qr-accent);
  vertical-align: 0.08rem;
}

.qr-diagram-card__hint--wide::before {
  background: #059669;
}

.qr-diagram-dialog {
  width: min(96vw, 110rem);
  max-width: none;
  height: 92vh;
  max-height: none;
  margin: auto;
  padding: 0;
  overflow: hidden;
  border: 1px solid #334155;
  border-radius: 14px;
  background: #0c1322;
  box-shadow: 0 32px 90px rgb(0 0 0 / 48%);
  color: #e7edf6;
}

.qr-diagram-dialog::backdrop {
  background: rgb(4 9 20 / 82%);
  backdrop-filter: blur(3px);
}

.qr-diagram-dialog__shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  height: 100%;
}

.qr-diagram-dialog__header {
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.6rem;
  padding: 0.85rem 1.1rem 0.85rem 1.35rem;
  border-bottom: 1px solid #2a3549;
  background: #121b2c;
}

.qr-diagram-dialog__heading {
  display: grid;
  min-width: 0;
  gap: 0.25rem;
}

.qr-diagram-dialog__eyebrow {
  color: #7db0ff;
}

.qr-diagram-dialog__title {
  overflow: hidden;
  margin: 0;
  color: #f8fafc;
  font-size: clamp(1rem, 1.8vw, 1.3rem);
  font-weight: 680;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.qr-diagram-dialog__controls {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.45rem;
}

.qr-diagram-control {
  min-width: 2.35rem;
  padding: 0.5rem 0.65rem;
  border-color: #3b4a61;
  background: #1b2639;
  color: #e7edf6;
}

.qr-diagram-control:hover {
  border-color: #6f82a0;
  background: #24324a;
}

.qr-diagram-control:not(.qr-diagram-control--fit, .qr-diagram-control--close) {
  width: 2.35rem;
  padding-inline: 0;
  font-size: 0;
}

.qr-diagram-control--close {
  margin-left: 0.25rem;
  border-color: #51617a;
}

.qr-diagram-dialog__zoom {
  min-width: 3.5rem;
  color: #cbd5e1;
  font-variant-numeric: tabular-nums;
  font-size: 0.76rem;
  font-weight: 650;
  text-align: center;
}

.qr-diagram-stage {
  position: relative;
  min-height: 0;
  overflow: hidden;
  background-color: #edf2f7;
  background-image:
    linear-gradient(rgb(148 163 184 / 16%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(148 163 184 / 16%) 1px, transparent 1px);
  background-size: 28px 28px;
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.qr-diagram-stage.is-dragging {
  cursor: grabbing;
}

.qr-diagram-canvas {
  position: absolute;
  top: 50%;
  left: 50%;
  will-change: transform;
  transform-origin: center;
}

.qr-diagram-canvas > svg {
  display: block;
  max-width: none !important;
  max-height: none !important;
  filter: drop-shadow(0 12px 18px rgb(15 23 42 / 12%));
}

.qr-diagram-dialog__footer {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  min-height: 2.65rem;
  padding: 0.5rem 1.25rem;
  border-top: 1px solid #2a3549;
  background: #121b2c;
  color: #9eacc0;
  font-size: 0.72rem;
  line-height: 1.35;
}

.qr-diagram-dialog__instruction::before {
  content: "";
  display: inline-block;
  width: 0.32rem;
  height: 0.32rem;
  margin-right: 0.4rem;
  border-radius: 50%;
  background: #60a5fa;
  vertical-align: 0.08rem;
}

@media (max-width: 720px) {
  .qr-diagram-card__toolbar {
    align-items: flex-start;
  }

  .qr-diagram-card__title,
  .qr-diagram-card__hint--wide,
  .qr-diagram-control--fit span {
    display: none;
  }

  .qr-diagram-card > .mermaid {
    padding: 1rem;
  }

  .qr-diagram-dialog {
    width: 100vw;
    height: 100dvh;
    border: 0;
    border-radius: 0;
  }

  .qr-diagram-dialog__header {
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem;
  }

  .qr-diagram-dialog__heading {
    max-width: 12rem;
  }

  .qr-diagram-control--fit,
  .qr-diagram-control--close {
    width: 2.35rem;
    padding-inline: 0;
    font-size: 0;
  }

  .qr-diagram-dialog__footer {
    gap: 0.7rem;
    overflow-x: auto;
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .qr-diagram-open,
  .qr-diagram-control {
    transition: none;
  }
}